Malicious PDF — malware analysis report

Static analysis result for SHA-256 227932328d94744c…

MALICIOUS

PDF

75.3 KB Created: 2021-09-17 22:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e1bd6b3bd779fdcc0719caaba416f0ca SHA-1: 5a0fe08ff1ea4d7a67ff17f0fedc0242fd5f2de8 SHA-256: 227932328d94744c2f6555204fcf1f19fff699268f06d363c263a55965a86914
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically identified as a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=unlock+all+skin+ml+apk+download PDF link annotation
    • https://commonwealthsportsawards.com/userfiles/file/zodam.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/17520959168.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/risajugu.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/vazidoritok.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/54856147152.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/34455274048.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/52555458583.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/dozananoli.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/marisiwazav.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/926404297.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/gubisekaw.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/53966379318.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/baretememelokuz.pdfIn PDF document text
    • http://dgjst.com/upfile/file/38628049740.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/55863894330.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/98235467725.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/89907941171.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/67672078280.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/67223276979.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/50490791282.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/takozijig.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/9296998623.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/77701654586.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/zesigawavagimekiguji.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC332 10528 bytes
SHA-256: 2fab81a9a5fb0d727c5df0c0e5f197487798458df85b2485ad898497332d5b32
font_01_sfnt_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 17156 bytes
SHA-256: 447e58652cb3c4abc116ebcbc795b554f55c4f14064b593903a4b851572177e3
font_02_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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